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Revised version of this popular video on centre of mass of a composite lamina

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Avoid common mistakes when finding the 2nd differential in a parametric equation. Latest video.

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Volume of Revolution about the x-axis for parametric equations, video just updated.

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Been asked to provide a mixed exercise for Pythagoras and Trigonometry. Please share this if you think it useful. Thank you.

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Latest video on trig. identities - max and min for the harmonic form. Part(1)

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Part (2) of my series on max and min values for the harmonic trig. identities.

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Latest video, E(X²) for Discrete random variables just added. I hope you find it useful.

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Latest video to hit the big screen - Mixed exercise on finding an angle using trigonometry.

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Oops! Remake due to minor error. I cannot add up.

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